Answer:
a) decreases and larger sediments are deposited first
Explanation:
As the Niagara River enters the Lake Ontario, it is coming up to a large body of water that is stopping its flow as it enters in it. This results in a loss of velocity. Because the river losses its velocity, it is no longer able to carry the sediments with it, thus it starts to deposit them. The largest sediments are deposited first as they weigh the most, so the river needs greater velocity to transport them. As the velocity is becoming smaller and smaller, the medium sized sediments come next for deposition, and in the end are the smallest sediments that are deposited when the river totally losses its velocity.
Answer:
A stump is formed through a series of erosional processes. This are corrasion (the effects of material suspended in the water being thrown against the headland), and hydraulic action (the effect of the build-up of pressure, as waves compress air in to cracks). Through these processes a fissure will form in a headland, and over time this will widen and deepen in to a crack. This this then continue to be eroded until a cave is formed. Through the erosional processes this cave will eventually be eroded right through, leaving a three-sided landform known as an arch. An example of this is Durdle Door. Over time, the roof of this arch will become unsupported and will collapse, leaving a stack which is unconnected from the headland. An example of this is Old Harry. Over time this stack will be eroded in to a stump, which will eventually disappear completely.
SOURCE: MyTutor